I removed the vertical support poles for the awning and lowered the awning along the side of the camper.
It's been a few years since we sold our Fleetwood Santa Fe but my recollection is that the awning's vertical support poles weren't detachable but rather nested inside the front awning rail so I'm wondering what could be different about your's other than the fact you have 3 vertical support poles while mine had 2. I could easily set up / pack away my awning solo, the first step being to add Velcro to the awning and bag so the awning wouldn't suddenly unravel when the bag was unzipped ...

Unzip the bag, unroll the awning and allow the vertical support poles to drop out of their nested position within the front rail, grab the one ridge pole that I had stored within the rolled up awning and set it in position. At this point the awning was self supporting and would simply elevate with the roof ... once that was done I could go around and add the remaining ridge poles. Packing the awning away was simply the reverse.